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Grapefruit Tree fertilizer

11 years ago

Hi everyone. I have a question regarding fertilizer for a grapefruit tree. I currently use Dyna Gro Pro and recently bought Dyna Gro Bloom for flower support. Could I use these two together or would that be too difficult for the tree? I was thinking of alternating them weekly. Thanks in advance for your help!!!

Comments (9)

  • 11 years ago

    I would follow the directions on the package, or consult a Dyna Gro representative.

    I use Foliage Pro, and occasionally supplement with Pro-TeKt, for which there are instructions. You need to be careful, though, and make sure that products work together. For example, the Pro-TeKt needs to be diluted in the watering can before mixing with Foliage Pro because the two will cause elements to precipitate.

    Josh

    Newtster thanked greenman28 NorCal 7b/8a
  • 11 years ago

    Newtster, you wouldn't need to duplicate your fertilizing efforts. Nothing supports using two different fertilizer formulations. Citrus need additional nitrogen. It does not discourage flower production. I would stick with Foliage Pro, which has a great NPK ratio for all citrus, plus the micros. Plants that benefit from a low N ratio formulation would be other types of flowering plants.

    Patty S.


    Newtster thanked hoosierquilt USDA 10A Sunset 23 Vista CA
  • 11 years ago

    Hi, thank you so much for your help!!! My tree has many flowers but I was hoping it would help in setting the fruit. Last year it dropped all its fruit but perhaps I was not watering or fertilizing enough. I love the Foliage Pro so I will continue with it for sure!!

  • 11 years ago

    Young trees normally drop some or all of their flowers or set fruit, as they develop a large enough canopy to sustain fruit. Perfectly normal. Do be sure to water appropriately and fertilize appropriately, so your tree's canopy can develop large enough to support some fruit.

    Patty S.


    Newtster thanked hoosierquilt USDA 10A Sunset 23 Vista CA
  • 11 years ago

    Hi Patty,

    I have been trying to get the canopy healthier because in the winter of 2013, I believe I had overwatered it. In January 2014, it dropped many, many leaves and just looked sickly. I repotted it and it seemed better but it only had a few new leaves, sent out flowers, set fruit but it all dropped. I live in Las Vegas so the summers are hot but it did ok. My husband and I built a small greenhouse from French doors and it spent the winter in it. It seemed very happy in the greenhouse and it now has lots of flowers and new leaves!! It is very, very green and looks good. I believe it is recovering but if you have any advice on how to get the canopy full again, that would be great. I was going to attach a picture but I keep losing my text, so I'll try separately. . Thanks again!!

  • 11 years ago

    Hi Newster,

    If the tree still recovering, you may not want it to set fruit this year. It takes a lot of energy to produce fruit which maybe be better spent on rebuilding the canopy. I'm actually in the Henderson area and have couple of trees like yours and several that are thriving (both in ground and in pots). What type of soil are you using, as that seems to be the trickiest part for potted citrus in our parts. I've found that most of the varieties I've worked with don't seem to mind the heat around here (given you protect from sunburn), but it's the cold that can get them.

    My suggestion is that while you're waiting for the first to recover, purchase another variety from Costco for about $20 and do all the correct things with it ! Apparently, they're not in store yet but will be in the near future.

    Newtster thanked zwoydziak9bsunset13
  • 11 years ago

    Thank you so much!! That is great you are a neighbor, so you understand the challenges we have with weather. It's difficult now that the nights are still cold and the days are warm. The soil it is in now is a combination of Miracle Grow and Pro Mix, so it is on the light side, but does hold water nicely. I am much more careful about how often I water and am on a good fertilizing schedule. I think I will do what you suggest about buying another. We do learn as we go so having another may be good for lots of reasons.

  • 11 years ago
    last modified: 11 years ago

    I've been using a 5:1:1 variant soil mixture that Patty suggested in post a while back, which is one part bark fines (small sized mulch at Walmart), 1 part perlite, and 4 parts MG garden soil. This mixture seems to hold enough moisture to survive our dryness. Switching to this soil mixture pretty much put an end to my citrus murdering tendencies. The Foilage Pro and Osmocote plus fertilizers have helped too. I just potted a Tango mandarin and put a Gold nugget in the ground. Upon reading, these two varieties seem like they should do well enough in our area. I guess time will tell.

    Newtster thanked zwoydziak9bsunset13